AE地图文档的操作，新建打开保存另存为地图文档的实例

一个简单的实例，AE地图文档的一些操作，包括新建，打开，保存，另存为地图文档等操作。

功能介绍：新建地图文档，新建之前判断当前是否存在地图文档，如存在则提示是否保存，点击是保存当前文档并新建空白文档；点击否则直接新建地图文档。

　　　　　打开地图文档，打开一个新的地图文档。如果当前存在地图文档则直接重新加载新打开的地图文档。

　　　　　保存地图文档，保存当前的地图文档。

　　　　　另存为地图文档，将当前地图文档另存为一个新的地图文档。

开发环境：ArcObject10.1，VS2010

代码如下：

        private void 新建ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //如果当前没有图层，则不操作
            if (axMapControl1.Map.LayerCount == 0)
            {

            }
            else
            {
                ICommand command = new CreateNewDocument();
                command.OnCreate(axMapControl1.Object);
                command.OnClick();
            }
        }

        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ICommand command = new ControlsOpenDocCommandClass();
            command.OnCreate(axMapControl1.Object);
            command.OnClick();
        }

        private void 保存ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            string m_currentMapDocument = axMapControl1.DocumentFilename;

            if (axMapControl1.Map.LayerCount == 0)
            {
                MessageBox.Show("没有地图文档需要保存！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                return;
            }

            //execute Save Document command
            if (axMapControl1.CheckMxFile(m_currentMapDocument))
            {
                //create a new instance of a MapDocument
                IMapDocument mapDoc = new MapDocumentClass();
                mapDoc.Open(m_currentMapDocument, string.Empty);

                //Make sure that the MapDocument is not readonly
                if (mapDoc.get_IsReadOnly(m_currentMapDocument))
                {
                    MessageBox.Show("Map document is read only!");
                    mapDoc.Close();
                    return;
                }

                //Replace its contents with the current map
                mapDoc.ReplaceContents((IMxdContents)axMapControl1.Map);

                //save the MapDocument in order to persist it
                mapDoc.Save(mapDoc.UsesRelativePaths, false);

                //close the MapDocument
                mapDoc.Close();

                MessageBox.Show("保存地图文档成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
            }
            else
            {
                MessageBox.Show(m_currentMapDocument + "不是有效的地图文档！", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void 另存为ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (axMapControl1.Map.LayerCount == 0)
            {
                MessageBox.Show("没有地图文档需要保存！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
                return;
            }

            try
            {
                ICommand command = new ControlsSaveAsDocCommandClass();
                command.OnCreate(axMapControl1.Object);
                command.OnClick();
                MessageBox.Show("另存为地图文档成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }

其中，新建地图文档CreateNewDocument类的代码：

/// <summary>
    /// Summary description for CreateNewDocument.
    /// </summary>
    public class CreateNewDocument : BaseCommand
    {
        private IHookHelper m_hookHelper = null;

        //constructor
        public CreateNewDocument()
        {
            //update the base properties
            base.m_category = ".NET Samples";
            base.m_caption = "NewDocument";
            base.m_message = "Create a new map";
            base.m_toolTip = "Create a new map";
            base.m_name = "DotNetTemplate_NewDocumentCommand";
        }

        #region Overridden Class Methods

        /// <summary>
        /// Occurs when this command is created
        /// </summary>
        /// <param name="hook">Instance of the application</param>
        public override void OnCreate(object hook)
        {
            if (m_hookHelper == null)
                m_hookHelper = new HookHelperClass();

            m_hookHelper.Hook = hook;
        }

        /// <summary>
        /// Occurs when this command is clicked
        /// </summary>
        public override void OnClick()
        {
            IMapControl3 mapControl = null;

            //get the MapControl from the hook in case the container is a ToolbarControl
            if (m_hookHelper.Hook is IToolbarControl)
            {
                mapControl = (IMapControl3)((IToolbarControl)m_hookHelper.Hook).Buddy;
            }
            //In case the container is MapControl
            else if (m_hookHelper.Hook is IMapControl3)
            {
                mapControl = (IMapControl3)m_hookHelper.Hook;
            }
            else
            {
                //MessageBox.Show("Active control must be MapControl!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                MessageBox.Show("必须是MapControl控件!", "警告", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                return;
            }

            //check to see if there is an active edit session and whether edits have been made
            DialogResult result;
            IEngineEditor engineEditor = new EngineEditorClass();

            if ((engineEditor.EditState == esriEngineEditState.esriEngineStateEditing) && (engineEditor.HasEdits() == true))
            {
                //result = MessageBox.Show("Would you like to save your edits", "Save Edits", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);
                result = MessageBox.Show("是否保存编辑", "保存编辑", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);


                switch (result)
                {

                    case DialogResult.Cancel:
                        return;

                    case DialogResult.No:
                        engineEditor.StopEditing(false);
                        break;

                    case DialogResult.Yes:
                        engineEditor.StopEditing(true);
                        break;

                }
            }

            //allow the user to save the current document
            //DialogResult res = MessageBox.Show("Would you like to save the current document?", "AoView", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            DialogResult res = MessageBox.Show("是否保存当前地图文档？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question);
            if (res == DialogResult.Yes)
            {
                //launch the save command
                ICommand command = new ControlsSaveAsDocCommandClass();
                command.OnCreate(m_hookHelper.Hook);
                command.OnClick();
            }

            //create a new Map
            IMap map = new MapClass();
            map.Name = "Map";

            //assign the new map to the MapControl
            mapControl.DocumentFilename = string.Empty;
            mapControl.Map = map;
        }

        #endregion
    }

 源代码完整实例下载地址：MapDocumentOperation.rar